1 files changed, 66 insertions, 0 deletions
diff --git a/httemplate/elements/cssexpr.js b/httemplate/elements/cssexpr.js
new file mode 100644
index 0000000..c434d8d
--- /dev/null
+++ b/httemplate/elements/cssexpr.js
@@ -0,0 +1,66 @@
+function constExpression(x) {
+	return x;
+}
+
+function simplifyCSSExpression() {
+	try {
+		var ss,sl, rs, rl;
+		ss = document.styleSheets;
+		sl = ss.length
+	
+		for (var i = 0; i < sl; i++) {
+			simplifyCSSBlock(ss[i]);
+		}
+	}
+	catch (exc) {
+		//alert("Got an error while processing css. The page should still work but might be a bit slower");
+		throw exc;
+	}
+}
+
+function simplifyCSSBlock(ss) {
+	var rs, rl;
+	
+	for (var i = 0; i < ss.imports.length; i++)
+		simplifyCSSBlock(ss.imports[i]);
+	
+	if (ss.cssText.indexOf("expression(constExpression(") == -1)
+		return;
+
+	rs = ss.rules;
+	rl = rs.length;
+	for (var j = 0; j < rl; j++)
+		simplifyCSSRule(rs[j]);
+	
+}
+
+function simplifyCSSRule(r) {
+	var str = r.style.cssText;
+	var str2 = str;
+	var lastStr;
+	do {
+		lastStr = str2;
+		str2 = simplifyCSSRuleHelper(lastStr);
+	} while (str2 != lastStr)
+
+	if (str2 != str)
+		r.style.cssText = str2;
+}
+
+function simplifyCSSRuleHelper(str) {
+	var i, i2;
+	i = str.indexOf("expression(constExpression(");
+	if (i == -1) return str;
+	i2 = str.indexOf("))", i);
+	var hd = str.substring(0, i);
+	var tl = str.substring(i2 + 2);
+	var exp = str.substring(i + 27, i2);
+	var val = eval(exp)
+	return hd + val + tl;
+}
+
+if (/msie/i.test(navigator.userAgent) && window.attachEvent != null) {
+	window.attachEvent("onload", function () {
+		simplifyCSSExpression();
+	});
+}